Car-brake.



J. G. KERR.

GAR BRAKE.

I APPLICATION FILED PEB.6,1908. 906,635. Patented Dec. 15,1908

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J. G. KERR.

OAR BRAKE.

APPLICATION FILED FEB-6,1908.

906 ,635 Patented Dec. 15, 1908.

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JOSEPH G. KERR, OF IONIA, KANSAS.

CAR-B RAKE Specification of Letters Patent.

Patented Dec. 15, 1908.

Application filed February 6, 1908. Serial No. 414,546.

To all whom it may concern:

Be it known that I, JOSEPH G. Kenn, citizen of the United States,residing at lonia, in the county of Jewell and State of Kansas, haveinvented certain new and useful Improvements in Car-Brakes, of which thefolowing is a specification.

The present invention is in the nature of an improved brake for railwaycars, and has I for its primary object to provide a device of thischaracter which can be easily manipulated and will operate in a positivemanner to move the brake shoes into a close engagement with the carwheels.

A further object of the invention is to design a brake mechanism whichis simple and inexpensive in its construction and can be readily mountedupon any conventional form of car.

For a full description of the invention and the merits thereof and. alsoto acquire knowledge of the details of construction and the means foreffecting the result, reference is to be had to the followingdescription and accompanying drawings, in which:

Figure 1 is a view showing the invention applied to a car, portionsbeing shown in section. Fig. 2 is a perspective view of a portion of thecar axle and the members mounted thereon. Fig. 3 is a longitudinalsectional view through the members shown in Fig. 2, the shoes being outof engagement with the friction disk. Fig. 4 is a similar view with theshoes in engagement with the friction disk. Fig. 5 is a detail view ofthe drum and bar applied to one end thereof.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

For the purpose of illustration the brake mechanism is shown as mountedupon an ordinary street railway car of which the numeral 1 designatesthe body portion and 2 one of the axles. An operating lever 3 ispivotally mounted at an intermediate point upon a bracket projectingdownwardly from one of the platforms of the car, one end of the leverbeing loosely connected to a footpiece or plunger 4 while the oppositeend is connected to a rod 5 terminating in a chain 6, which passes overa guide pulley 7 and is secured to a downwardly extending rod 8. Thisrod 8 has an operative connection with a shipper lever 9 formed withspaced arms embracing a sleeve 10 slidably mounted upon the axle 2. Itmay be mentioned at this point that the shipper lever 9 is looselymounted upon a bracket projecting over the rocks, while the spaced armsof the shipper lever are of a sufficient length to permit the usual upand down movement of the car body relative to the trucks. A coil spring11 iitting loosely around the axle 2 bears against one end of the sleeve10 and normally tends to move the same toward a friction disk 12 rigidwith the axle. The opposite end of the spring 11 abuts against a band 13which is rigidly clamped upon the axle in any suitable manner. Looselymounted upon the axle 2 on the opposite side of the friction disk 12 isa brake drum 14 having a chain or cable 15 connected thereto, the saidcable having an operative connection with any conven tional form ofbrake mechanism.

Projecting laterally in opposite directions from one end of the brakedrum 1e are the arms 16, the said arms being shown in the presentinstance as constituted by the ends of a bar 17 which is enlarged at itscentral point and formed with an opening to receive the axle, the end ofthe brake drum being suitz bly recessed as shown to receive the middleportion of the bar. A brake beam 18 is pivotally connected to theextremity of each of the arms 16, the said brake beams being providedwith suitable shoes 19 designed to frictionally engage the groovedperiphery of the disk 12. The swinging ends of the brake beams 18 areconnected by the links 20 to the inner ends of brake levers 21, the saidbrake levers being fulcrumed at an intermediate point upon lateral arms22 proj ecting from a ring 23 which is loose upon the axle between thesleeve 10 and the friction disk 12. As shown on the drawings the arms 22have both ends thereof bifurcated, the inner ends being rigidlyconnected to the ring 23 while the outer ends loosely receive the brakelevers. The outer ends of the brake levers are connected by means of thetoggle members 24 to a second ring 25 which is loosely received withinan annular groove 26 at one end of the sleeve 10.

The various parts of the brake mechanism are so mounted with relation toeach other that when the sleeve 10 is moved toward the friction disk bythe shipper lever, the toggle members 24 are inclined inwardly and causethe brake beams 18 to swing outwardly so that the shoes 19 are held outof engagement car body so as to swing laterally as the car with thefriction disk. The drum 14 then revolves loosely upon the axle and thewheels of the car turn freely without causing the brake to be applied.However, when pres sure is exerted upon the foot-piece 4 the shipperlever 9 operates to move the sleeve 10 against the action of the coilspring 11 and the ring 25 which is received loosely within the groove 26upon the said sleeve operates through the toggle levers 24 to move theouter ends of the brake levers 21 apart. This in turn draws the innerends of the brake levers toward each other and causes the shoes 19 to beforced into a frictional engagement with the groove of the disk 12.These shoes then have a tendency to rotate with the disk and cause thebrake beams and all members attached thereto to turn with the axle. Inthis manner the brake drum 14 is locked with the axle and as the saidbrake drum re volves the cable 15 is wound up and the brake mechanismapplied in the usual manner. For the purpose of enabling the brake to beheld in an operative position without the necessity of holding the footupon the plunger 4 it is designed to provide the plunger with a numberof notches which are adapted to engage a plate 27 secured to the bottomof the car. With this construction it will be readily apparent that whenthe plunger is forced downwardly and moved toward the plate one of thenotches will engage the same and will prevent upward movement of theplunger, thereby enabling the foot to be removed without releasing thebrakes. As soon however as the plunger is swung away from the plate andreleased from engagement therewith the coil spring 11 operates to againmove the sleeve 10 toward the friction disk and in so doing releases thebrake mechanism and causes the plunger or foot-piece to be again movedupwardly into normal position.

Having thus described the invention, what is claimed as new is:

1. In a car brake, the combination of a friction disk rigid with theaxle, a brake drum loose upon the axle, a brake mechanism having anoperative connection with they drum, brake beams carried by the drum,shoes mounted upon the brake beams, a ring loose upon the axle, leverscarried by the ring and having an operative connection with the brakebeams, and a sleeve slidably mounted upon the axle and having anoperative connection with the levers.

2. In a car brake, the combination of a friction disk rigid with theaxle, a brake drum loose upon the axle, a brake mechan ism having anoperative connection with the drum, a brake beam carried by the drum, abrake shoe mounted upon the brake beam, a brake lever having anoperative connection with the brake beam, and means cooperating with thebrake lever for moving the shoes into engagement with the friction disk.

3. In a car brake, the combination of a friction disk rigid with theaxle, a brake drum loose upon the axle, a brake naechanism having anoperative connection with the brake drum, a sleeve slidable upon theaxle, a brake shoe carried by the drum, and means cooperating with thesaid sleeve for causing the brake shoe to engage the drum.

4. In a car brake, the combination of a friction disk rigid with theaxle, a brake drum loose upon the axle, a brake mechanism having anoperative connection with the brake drum, a brake beam carried by thedrum, a brake shoe mounted upon the brake beam, a sleeve slidablymounted upon the axle and having an operative connection with the brakebeam, and means cooperating with the sleeve for moving the shoe intoengagement with the friction disk.

5. In a car brake, the combination of a friction disk rigid with theaxle, a brake drum loose upon the axle, a brake mechanism having anoperative connection with the drum, brake beams carried by the drum,shoes mounted upon the brake beams, levers having an operativeconnection with the brake beams, a sleeve slidable upon the axle, and atoggle mechanism controlled by the sleeve for operating the levers.

6. In a car brake, the combiantion of a friction disk rigid with theaxle, a brake drum loose upon the axle, a brake mechanism having anoperative connection with the drum, arms projecting from the drum, brakebeams pivotally mounted upon the arms, brake shoes carried by the beams,a ring loose upon the axle, brake levers carried by the ring, anoperative connection between the brake levers and the brake beams, asecond ring having a toggle connection with the brake levers, and meansfor moving the second ring to operate the levers.

In testimony whereof I aflix my signature in presence of two witnesses.

JOSEPH G. KERR.

